Anthropic's Claude Code has quietly updated its `workflow` trigger to `ultracode` in version 2.1.160. This change, implemented without significant fanfare, means that any scripted prompts or agents relying on the literal word `workflow` to initiate parallel subagent execution will now default to a single-agent run. While the underlying classifier for dynamic workflows still functions with natural language requests, the removal of the `workflow` keyword as a fast-path trigger has caused regressions for users who adopted it in prompts, CLAUDE.md files, or CI scripts. AI
IMPACT Developers using Claude Code's scripting features may need to update their prompts and agents to accommodate the renamed 'workflow' trigger to 'ultracode'.
RANK_REASON This is a minor product update for a specific tool, not a new model release or significant industry event.
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